Generalized Ozaki cost function

The generalized-Ozaki cost is a general description of cost described by Shuichi Nakamura. [cite journal |author=Shinichiro Nakamura |title=A Nonhomothetic Generalized Leontief Cost Function Based on Pooled Data |journal=The Review of Economics and Statistics |volume=72 |issue=4 |year=1990 |pages=649–656 |url=http://links.jstor.org/sici?sici=0034-6535%28199011%2972%3A4%3C649%3AANGLCF%3E2.0.CO%3B2-0 |doi=10.2307/2109605]

For output "y", at date "t" and a vector of "m" input prices "p", the generalized-ozaki cost, "c", is

: $c(p,y,t)\; =\; sum\_i\; b\_\{ii\}\; left(\; y^\{b\_\{yie^\{b\_\{ti\}t\}\; p\_i\; +\; sum\_\{j,:,j\; eq\; i\}\; b\_\{ij\}\; sqrt\{p\_ip\_j\}\; y^\{b\_y\}\; e^\{b\_tt\}\; ight).$

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